The radial wave equation (REF ) for the massive scalar field on a D1/D5 background is mutatis mutandis the same as on a D3 background [1]}, that can be mapped to the quantum SW curve of pure SU(2) gauge theory, or equivalently to the (modified) Mathieu equation, as shown in [2]}, [3]}.
Setting
\(r={\hbar \tilde{\omega }L^2\over 2}\sqrt{y}=L\@root 4 \of {{\tilde{\omega }^2\over \tilde{\omega }^2-{\mu }^2}}e^{iz}\) 
